Search found 6 matches

by kellyad33
Sat Dec 04, 2021 10:20 am
Forum: JLM Audio Kits
Topic: BA500v2 Mic Pre Amp BUILD THREAD 500/51X
Replies: 39
Views: 57216

Re: BA500v2 Mic Pre Amp BUILD THREAD 500/51X

OK thanks I'll send some pics. I disconnected the DI and jumpered those pins. The hiss increases/decreases when the gain pot is turned up and down. The pad switch doesn't affect the hiss volume. Also just noticed that even with the 500 rack unpowered there is a low level hum being generated (doesn't...
by kellyad33
Thu Dec 02, 2021 10:15 am
Forum: JLM Audio Kits
Topic: LA500A opto comp MAY 2021 BUILD THREAD 500/51X
Replies: 108
Views: 186428

Re: LA500A opto comp MAY 2021 BUILD THREAD 500/51X

Question about the POT board. When installing the IDC header one of the pics shows a linking wire to a hole from the center pin of the header (basically in the direct center of the board).

I only noticed in it in the picture, not instructions. Is this necessary? (maybe it's an older version?)
by kellyad33
Thu Dec 02, 2021 9:40 am
Forum: JLM Audio Kits
Topic: BA500v2 Mic Pre Amp BUILD THREAD 500/51X
Replies: 39
Views: 57216

Re: BA500v2 Mic Pre Amp BUILD THREAD 500/51X

Stink. Finished the build but I'm just getting white noise with a very very low mic signal coming through (for both mic input and DI). I'll get it out and check it all and see if there's anything obviously wrong, but I was pretty confident in the build so not sure. Oh well, I'll do the compressor bu...
by kellyad33
Tue Nov 30, 2021 11:27 am
Forum: JLM Audio Kits
Topic: BA500v2 Mic Pre Amp BUILD THREAD 500/51X
Replies: 39
Views: 57216

Re: BA500v2 Mic Pre Amp BUILD THREAD 500/51X

Great build though, the new layout is very neat and easy to follow
by kellyad33
Tue Nov 30, 2021 11:19 am
Forum: JLM Audio Kits
Topic: BA500v2 Mic Pre Amp BUILD THREAD 500/51X
Replies: 39
Views: 57216

Re: BA500v2 Mic Pre Amp BUILD THREAD 500/51X

Ok thanks that's great. One more question ...for the 500 series chassis, do I still cut off the extra pins on the main PCB? (the 51X pins). I'm assuming the intent is to look through the older build for any additional instructions? Like following the VU meter calibration instructions from the older ...
by kellyad33
Mon Nov 29, 2021 12:00 pm
Forum: JLM Audio Kits
Topic: BA500v2 Mic Pre Amp BUILD THREAD 500/51X
Replies: 39
Views: 57216

Re: BA500v2 Mic Pre Amp BUILD THREAD 500/51X

Just building this BA500v2 now and didn't realise there wasn't a complete build thread for this version. The build maps are great, and the base build seemed simple and complete. But I wasn't sure with some of the Go Between Build Map ...What do I do when I get to: CZbl See chart Ratio See chart Phas...